31231697952 has 96 divisors (see below), whose sum is σ = 100902436992. Its totient is φ = 8236929024.

The previous prime is 31231697933. The next prime is 31231697977. The reversal of 31231697952 is 25979613213.

It is a tau number, because it is divible by the number of its divisors (96).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1778793 + ... + 1796264.

It is an arithmetic number, because the mean of its divisors is an integer number (1051067052).

Almost surely, 2^31231697952 is an apocalyptic number.

31231697952 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31231697952 is an abundant number, since it is smaller than the sum of its proper divisors (69670739040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31231697952 is a wasteful number, since it uses less digits than its factorization.

31231697952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3575090 (or 3575082 counting only the distinct ones).

The product of its digits is 612360, while the sum is 48.

The spelling of 31231697952 in words is "thirty-one billion, two hundred thirty-one million, six hundred ninety-seven thousand, nine hundred fifty-two".